In the 18th century, the poet Edward Young asked if "we were all born originals, why is it that so many die copies?"

Before I discovered my left tongue I began to notice that I do not actually see another person's left eye. (Interesting just on TV interviewing 2 people side by sidein different locations both right side of the faces lit while the left in shadow). It remains at the periphery of my consciousness normally. I believe I learned to relate right eye to right eye. In a sense I know at some level that I am speaking to the other person's right side and that is how the other person relates to me. I often now try to see a person's left eye with my left eye. It appears to me most of the time that the left side is not the side that is communicating verbally back to me.

A long-standing puzzle in developmental psychology is how infants
imitate gestures they cannot see themselves perform (facial gestures).
Two critical issues are: (a) the metric infants use to detect cross-modal equivalences in human acts and (b) the process by which they correct their imitative errors.

If I learned to imitate on an unconscious level did I learn to communicate verbally right side to right side? It would be feedback back and forth between my parents and me at first.

The percentages of left-handedness were 18.23% and 17.02% in male and
female blind children, and 11.02% and 7.52% in male and female sighted
children, respectively. It can be stated that sighting is important in
the development of normal typical cerebral lateralisation or hand
preference.

Since it is not 50% it would not seem that the visual feedback loop could be the only cause.

Two Northwestern University researchers now report that a high degree of
cooperation, not something odd or sinister, plays a key role in the
rarity of left-handedness. They developed a mathematical model that
shows the low percentage of lefties is a result of the balance between
cooperation and competition in human evolution.

A test of
handedness in a sample of 20 autistic children and 25 normal children
revealed marked differences. The frequency of non-right-handedness in
normal children was 12%, whereas it was 65% in autistic children. The
significance of this difference for the etiology of autism is discussed

I believe I learned to connect right eye to right eye as cued in that was the half of me that my parents were communicating with. I learned to make the communication back using the right eye and tongue leaving the left eye and tongue in a more subordinate role. In a way I think my left side in way is almost autistic. I cannot hold a beat with my left hand among other things. In a right handed society I can get by(just barely). Others may be more naturally balanced.